Two-part dipper for excavating-machines.



E. S. BLACK.

TWO-PART DIPPER FOR EXGAVATING MACHINES.

APPLICATION FILED FEB. 17, 1912.

Patented Aug. '18, 19M.

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v ALEty wr tten sit-arise aims-a @IHTFMEE E WARD s. BLACK, or CHICAGO, innmoisnss enon To nneaiannnnn eivinn oau MANoAnnsn STEEL COMPANY, or AUGU1TA,MAINE, acpurona'rroiv or MAINE.

' TWO-PART DIPPER FOR ET;GACVAYJ.IN(It-BLACKIN'ES,

Specification of Letterslfatent.

Patented rin is, iaia.

Application filed February-17; 1912. Serial no. 678,189.

To all whom it may comm,-

Be it known that T, EDWARD S. BLACK,

a citizen of the United States, and a resi'-' dent of Chicago, in the county of Cook and State of Illinois, have made and invented certain newv and useful Improvements in Two-Part Dippers' for Excavating-Machines, of which the following is a speci-' ficat-ion. t

My invention relates to dippers for excavating, dredging, digging and similar machines, and particularly to that type or form of dipper in which the body portion is made up of two parts each formed preferably from cast metal and in a single piece. and each part comprising substantially onehalf of the dipper body, said parts being se cured together to thereby form a two-part dipper body along joints located in the sides thereof. 1 p

The object of my invention is to provide an arrangement of lifting ears through .which the dipper is lifted by means of a.

suitable yoke or bail, in which the rivets or bolts whereby the ears are secured to the dipper body .are relieved from shearing action; and-to provide an arrangement in which the strains produced in digging do not produce shearing action upon the rivets or bolts whereby the two parts of the dipper body are secured, together. More specifically stated,

the objects of my invention are to provide a dipper body of the type above referred to in which the ears whereby the dipperis lifted when in use are located upon. and secured-to thefront portion of the dipper body, preferably in an inclined position; and to provide a dipper body in which lugs or equivalent. means are provided against which the ears abut, said lugs being also preferably located upon and formed integrally with the front-portion of the dipper body, whereby force transmitted through the lifting ears to the dipper'in digging acts against the lugs, which lugs, being located upon the same part of the dipper as that towhich the ears are secured, relieves therivets whereby the ears laresecured in place from shearing action to an extent not secured in cases where the lugs may move v away from the car when the dipper is in use, as is the case when the ears are secured toone and the lugs formed upon the other part of'a two-part dipper body.

With the above and other objects of in vention in view, my invention consists in the lmproved dipper hereinafter, described and claimed, and illustrated in the drawings accompanying and forming a .p'artof this application; and in such modifications thereof as will be obvious to those skilled in the art to which my invention'relates.

Referring to. the drawing wherein the preferred embodiment of my invention is illustrated; Figure l is a view showing one form of my improved two-part dipper in perspective; and, Fig. 2 is a view also in perspective showingvanother form of my improved construction.

Referring to the drawing, 3 is the rear portion, and ithe frontiportion of a twopart dipper body, these parts being formed each as a single integral casting preferably from manganese steel in order to secure excessive strength and durability for thedipper body. The rear portion 3 is provided with lugs 5, 6 to the forn'ier of which suitable directing mechanism issecured, while the latter serves as a hinge connection through which thebottom 7 of the dipper is pivotally supported, the details of this hinge connection not being disclosed, as they form no part of my invention.

The reference character 8 designates a detachable lip secured to the upper edge of the front portion of the dipper body, 9 designates a plurality of tooth supporting shanks secured to the said front portion, and 10 designates detachable points secured to the supports 9 in a manner well understood by those skilledin the art to which my invention relates, the upper ends of the shanks 9 lying in recesses 22 formed in the lip 8 in order to prevent sidewise movement'of the teeth. The front and rear port-ions of the dipper body are securedtogether along vertically extending joints 11 located in the sides of the dipper body about midway be-- tween the front and rear faces thereof, the front portion being preferably provlded with a flange 12 which overlies the front edge of'the rearportion of the dipper, and

the parts being secured together bysuitable fastening means such as rivets 13.

"iThe reference character 1.4: designates a suitable ear,- two'such ears being provided one located upon each side of the dipper adjacent the upper edge thereof. The ears are formed with offset portions 15, and with a transverse shoulder 16, connecting the ofi'set portion with the base of the ear. These ears are commonly secured to the front portion of the dipper body and the shoulder .16

therefore abuts against a projectinglug 17 located upon and preferably formed integrally 'with that portion of the dipper to which the ears are secured. The oifsetportion 15 of the ear is rovided with a hole 18 at its upper end, an 19 is a hole extending through the lug 17 and the front edge of the rear portion of the dipper, and through which holes a suitable pin extends when the dipper is in use; it being understood that I the dipper body as a whole when in use, is

lifted bymeans of a suitable bail or yoke the lower ends of which are pivotally connected with the dipper body through the ears above referred toby'means of pins passing through the holes 19, the lower ends of the yoke and the holes '18 in the ears. The ears 14 are preferably secured to the dipper body in an inclined position, although the degree of inclination is a 'matter'of secondaryim-. portance.

In the form of -my invention shown in Fig. 2, ribs 21 are provided which extend v I along each side of the base of the ear 14 the said. ribs and the lug 17 together roviding a pocket or recess in which the ase of the ear fits whereby a more effective protection against shearlng action of the rivets 20 is obtained. 1 a

From the above it .will be seen that as the lifting ears and the lugs against which they abut are upon one and the same part of the dipper body, the stresses produced in digging are transmitted directly to the lugs, and

not through the joint between the two parts of the body, as is the case when the ears are secured to one part and the lugs located upon the other from which it follows that the rivets whereby the ears are secured in place are relieved from shearing stresses to an extent not possible in cases Where the ears are not made to abut against a lug located upon the same part of the dipper as that to which the ears are secured. The location of the ears and lugs upon the front partof the dipper in addition to the advantages above referred to secures an application of the lifting force nearer to the front face of the dipper where the greatest resistance is encountered when the dipper is in use, and also serves to relieve the rivets whereby the front andrear portions of the body are se- "curedgtogether. from shearing stressesas will be hereinafter-explained, and the inclined arrangement of the ears secures an application of. the lifting force more nearlyin line' with the resistance encountered when the dipper is in use.

'In a' two-part dipper' 'body formed in accordance with my-invention, the lifting ears b'eing'secured in place upon the front 'portion of the dipper body, the strains due to I digging are not transmitted to any consider able extent. through the jpints between-the front and rear portions the dipper, as is the case when the lifting ears are secured to the rear portion of the dipper body, from which it follows that the rivets along the joints in question-are relieved from shearing action; whereas when the lifting ears are secured to the rear portion of the dipper body, the strain due to digging, acting,\ as

.it does at the front edge of the dipper, tends to tip the front portion about a fulcrum at the lower endsof the joints, thus subjecting the rivets along the joints to excessive shearing action, this shearing action being especially severe at the upper ends of the joints. This advantage is quite independent of the lugs referred to, and follows from the location of the lifting ears upon the front portion'of a two-part dipper body; although it will be understood that if the lifting ears are secured to one part of the dipper body and abut against lugs upon the other, forces transmitted through the ears act not only to 7 shear the rivets whereby they are secured in place, but also act against the lugs as fixed fulcrums andtend to force the two parts ofthe body apart and to introduce additional stresses tending to shear the rivets whereby the two parts are secured together.'.

5 In the specific embodiment of my invention illustrated in the drawing, it will be understood that when the dipper is in use force is transmitted through the ears 14 to the projecting lugs 17, and'that the lugs cannot under any ciroumstances be forced from are at all times relieved from shearing action. It will also be obvious that force applied to the lifting {yoke when the dipper is in use can under no circumstances be transinitted to the' rivets -13 whereby the front and rear portions of the dipper body are sedipper body,

cu'red together, asfwofild be-the case ifthe cars abutted against. lugs .upon the rear por tion of the dipper body, aud t-hat the forcerat f t b dy-=1 t-me cie .f l w that in my. improved construction of :dlP';

per, the rivets whereby the ears through which the dipper is lifted are secured to the dipper body are protected from shearing strains; and that the rivets whereby the front and rear portions of the body are secured together are also relieved from sh'earing strains ing the body, or due to the action of'the lifting ears upon thelugs as fulcrums.

Having thus described and explained my invention, I claim and desire to secureloy Letters Patent.

1. In a dipper for excavating and imilar machines, a dipper body comprising front and rear portions formed from cast metaland secured together along joints located in .thesides thereof to thereby form a two-part and each of which portions comprises approximately one-half of said body; two lifting ears located one upon each side of the body and secured to the front portion only thereof; two lugs formed integrally with the front portion of thebody and against which said-ears abut; and means for securing said several parts together.

2. 'In a dipperfor excavating and similar machines, andipper body comprising front and rear portions securedtogether along joints'locatefd in the sides thereof to thereby form a two-part dipper body, and each of which portions comprises approximately one-half of said body two lifting ears located one upon each side of the body and secured to the front portion only thereof;

two lugs upon the front portion of the body "and against which said ears abut; and means for securing said several parts together.

3. In a dipper for excavating and similar machines, a dipper body comprising front and rear portions secured together along joints located in the sides thereof to thereby form a two-part dipper body, and-each of which portions comprises approximately one-half of said body; two lifting ears located one upon each side of the body and se cured to the front portion' only thereof; projecting elements formed integrally with the front portion of the body and against which said ears abut, whereby movement of said ears is prevented, and means for securing said several parts together.

4. In a dipper for excavating and similar machines, a dipper body comprising front and rear portions formed from cast metal due to the mere act of liftsecured togetheralong joints'located in v the sides thereof to thereby form a two-part dipper body, and each of which portions comprises approximately one-half of said body; twolifting ears located one upon each side of the body and entirely upon the front' portion thereof; fastening means for securing said ear in place; means independent pf ,said fast n-ing, means located upon the front portion of said body for preventing movement'of said ears;'and meansforsecuring the front and rear portions of said body together.

5. In a dipper machines, a dipper body comprising front and rear portions secured together along joints located in the sides thereof to thereby form a twopart dipper body, and each of which portions comprises approximately one-half'of said body; two lifting cars located one upon each side of the body and se cured to one only of the portions thereof; two lugs upon that portion of the body to which said ears are secured, and against which said ears abut; and means for securing said several parts together. 6. In a dipper for excavating and similar machines, a dipper body comprising front and rear portions formed from cast metal secured together along joints located. in the sides thereof to thereby form a two-part dipper body, and each of which portions comprises approximately one-half of said body; two lifting ears located one upon each side of the body and secured to one only of the portions thereof; two lugs formed intogrally with that portion of the. body to which said ears are secured, and against which said ears abut; and means for securing said several parts together.

7. In a dipper for excavating and similar machines, a dipper body comprising front and rear portions secured together along 8- A dipper body having a, separately for excavating and similar formed front portion secured thereto along joints locatedin the sides of said body; two lifting ears located one upon each side of said .body and secured to the front portion only thereof; two" lugs located one adjacent to tlie upper-ends of each of said ears and against which said ears abut; and means 1 125 for securing said several parts together. 9. In ,adlpper for excavating and similar machines, a dipper body comprising front and rear portions secured together along 5 body and against which said ears abut; and Witnesses:

points located in the sides thereof; two lift- Signed at Chicago, in the county of Ceok.

ing ears located one uponeach side of the and State of Illinois, this 12th dav of Febbody and secured to the front portion only ruary, A. D. 1912. thereof; lugs upon the front portion of said EDWARD, S. BLACK.

means for securing said several parts to M. B. MYERS, gether. EUGENE G. BARREY. 

